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11:00 AM - 10:00 PMConvert pixels to rem and rem to px instantly. Essential for responsive CSS.
| Pixels | Rem (base 16px) | Em (base 16px) |
|---|
"rem" stands for "root em." It's a CSS unit that's relative to the font size of the root element (usually the HTML element). Unlike em units, which are relative to the parent element's font size, rem units are always relative to the root.
Example: If base font size is 16px and you want to convert 24px:
Using rem units allows your design to respect user preferences, including browser font size settings and accessibility needs. When a user changes their browser's default font size, rem-based designs will scale proportionally, while px-based designs won't.
Most browsers default to 16px. However, users can change this in their browser settings, which is why using rem units is recommended for accessibility.
Both work, but rem is generally preferred for consistency. Using rem for all sizing creates a more predictable, maintainable codebase.
Use our bulk converter or reference the conversion table above. You can also calculate mentally: divide the px value by 16.
Yes, rem units have excellent browser support and work in all modern browsers, including IE9 and above.
Using rem units allows your design to scale with user preferences. If a user increases their browser's default font size for accessibility, rem-based fonts will scale proportionally, while px-based fonts remain fixed.
